Spatiotemporal Patterns of Latrine-Site Use by Small-Clawed Otters in a Heterogeneous Rice Field Landscape

Aadrean,; Usio, Nisikawa

doi:10.3106/ms2019-0031

Cited by 4 publications

(1 citation statement)

References 32 publications

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“…Several previous studies have been conducted, such as Melisch et al (1994), Aadrean and Usio (2017), Usio (2020), andAndeska et al (2021) in Indonesia. Information regarding the existence of small-clawed otters in the UCPS hydropower area is also minimal.…”

Section: Introductionmentioning

confidence: 99%

The existence of Asian small-clawed otter (Aonyx cinereus Illiger, 1815) in the UCPS Hydropower, Cianjur, West Java, Indonesia

et al. 2021

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Abstract. Dirgantara AP, Megantara EN, Husodo T, Febrianto P, Wulandari I, Shanida SS. 2021. The existence of Asian small-clawed otter (Aonyx cinereus Illiger, 1815) in the UCPS Hydropower, Cianjur, West Java. Biodiversitas 22: 4391-4401. Little information about the existence of small-clawed otters (Aonyx cinereus) in Indonesia is available. Small-clawed otter is the top predator and biological indicator of wetland health. However, the small-clawed otter population in the world has decreased due to anthropogenic factors. This study aims to reveal 1) estimate the population size of small-clawed otters and 2) the small-clawed otter signs at the UCPS Hydropower construction site, Cianjur, West Java. This study used a qualitative approach in February-April 2017. Sign surveys (feces, footprints, leftovers, and dens) and camera trapping were applied in this study. There were 32 signs with details of 21 feces, eight footprints, and three dens. The estimation of small-clawed otter population size at UCPS Hydropower ranges from 5-14 individuals in total scattered in the Citali-Cisokan, Cilengkong, and Cirumamis rivers. In addition, the discovery of infant and bedding repair activities shows that the habitat in the UCPS Hydropower area supports the daily needs of small-clawed otters, especially in terms of breeding and shelter. Further studies are needed regarding the impact of the UCPS Hydropower construction on the existence of small-clawed otters, especially in the overlapping between small-clawed otter habitat and the UCPS Hydropower construction sites, by monitoring and making wildlife management policies.

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Section: Introductionmentioning

confidence: 99%

The existence of Asian small-clawed otter (Aonyx cinereus Illiger, 1815) in the UCPS Hydropower, Cianjur, West Java, Indonesia

et al. 2021

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Assessing habitat selection of the vulnerable Asian small-clawed otters in an anthropized riparian forest of eastern Bangladesh

Akash,

Feldman,

Ghose

et al. 2023

Mamm Res

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Multi-scale habitat influences sprainting and group size of a freshwater-obligate smooth-coated otter (Lutrogale perspicillata) in Tungabhadra Otter Conservation Reserve, India

Moun,

Kumar,

Priya

et al. 2024

Ecol Process

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Background The impact of changing land-use patterns and associated anthropogenic threats on scale-dependent habitat use of semi-aquatic mustelids in scent-marking and social behaviour can provide important insights into the habitat ecology of smooth-coated otters (Lutrogale perspicillata). Methods We sampled 180 stream segments (100–400 m) as spatial replicates of 60 1-km2 sites to record indirect evidence (i.e. spraints and mass latrine sites) and group sizes of smooth-coated otters along the Tungabhadra Otter Conservation Reserve (TOCR) during the dry season. To quantify habitat, we recorded stream characteristics, riparian vegetation, and anthropogenic disturbances at the local scale, and hydro-environmental characteristics and land uses at the landscape scale. Using Markovian-chain detection and occupancy models, we assessed the multi-scale habitat use of otters in their selection of suitable areas for scent-marking based on repeated presence-absence data on spraint/latrine locations along the TOCR. We further used linear regression techniques to explore relationships between the number of individuals in smooth-coated otter group and hydro-environmental characteristics, spraint/latrine encounter rate, anthropogenic pressure, land cover, topography, and vegetation. Results At the local scale, the probability of spraint deposition and group size decreased with anthropogenic disturbance while the probability of spraint detections decreased with grass cover. At the landscape scale, the probability of otter site use for spraint deposition and group sizes increased in southeast flowing streams. Spraint deposition increased with the proportion of sugarcane fields, whereas in contrast, group size decreased with proportion of sugarcane fields. Conclusions Our findings highlight the first empirical evidence on multi-scale habitat use of a southern Indian population of smooth-coated otters in an inland freshwater ecosystem surrounded by the scrub jungle–agriculture matrix. We suggest that habitat models built from analytical approaches that account for correlated detections can avoid biased predictions when estimating occupancy and detection probability of semi-aquatic or riparian mammal communities with linear distributions. Our findings indicate that human activity can impose constraints on the choice of sites used for spraint deposition and preliminary patterns in otter groups. The study provides some crucial evidence on the need to maintain areas with minimal human interference for sustainability of freshwater reserves.

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Spatiotemporal Patterns of Latrine-Site Use by Small-Clawed Otters in a Heterogeneous Rice Field Landscape

Cited by 4 publications

References 32 publications

The existence of Asian small-clawed otter (Aonyx cinereus Illiger, 1815) in the UCPS Hydropower, Cianjur, West Java, Indonesia

The existence of Asian small-clawed otter (Aonyx cinereus Illiger, 1815) in the UCPS Hydropower, Cianjur, West Java, Indonesia

Assessing habitat selection of the vulnerable Asian small-clawed otters in an anthropized riparian forest of eastern Bangladesh

Multi-scale habitat influences sprainting and group size of a freshwater-obligate smooth-coated otter (Lutrogale perspicillata) in Tungabhadra Otter Conservation Reserve, India

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